Protective relay



FIG. 1 is a perspective view of front, top plan and right side of a protective relay showing our new design;

FIG. 2 is a perspective view of rear, bottom and left side thereof;

FIG. 3 is a front view thereof;

FIG. 4 is a rear view thereof;

FIG. 5 is a top plan view thereof;

FIG. 6 is a bottom view thereof;

FIG. 7 is a left side view thereof; and,

FIG. 8 is a right side view thereof.

The broken line portion of the figure drawings is included to show unclaimed subject matter only and forms no part of the claimed design. 

The ornamental design for a protective relay, as shown and described. 